No access to Windows 8.1 administrative account

As I created another local account when recovering from a failed Microsoft account setup, I cannot supply the original Administrative account password [unknown] to make changes to the new Parallels 10/WIN 8.1 account. The User Account dialog is requesting an Administrator Password. None of the current/past passwords work - I believe this was a password corruption issue.

The new account was created using  http://kb.parallels.com/en/114193 as a guide.

My goal is to delete the original account and rename the new account and change the password.

With the new account, I am able to use the services/Apps of Windows 8.1 than I need. What I cannot do is make changes to any account without a password to the original account.
MARSPATHAsked:
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RizzleCommented:
There's a sticky key hack which can be used providing you boot to the windows RE using the Windows 8 disk

http://www.pcworld.com/article/249181/how_to_reset_your_windows_password.html

Another tool which could be used is the Offline NT password and reg editor

http://pogostick.net/~pnh/ntpasswd/
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MARSPATHAuthor Commented:
Seems a reasonable solution, thanks.
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